Threshold photoelectron spectroscopy of IO and IOH
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- Iodine oxides appear as reactive intermediates in atmospheric chemistry. Here, we investigate IO and HOI by mass‐selective threshold photoelectron spectroscopy (ms‐TPES), using synchrotron radiation. IO and HOI are generated by photolyzing iodine in the presence of ozone. For both molecules, accurate ionization energies are determined, 9.71±0.02 eV for IO and 9.79±0.02 eV for HOI. The strong spin‐spin interaction in the 3Σ− ground state of IO+ leads to an energy splitting into the Ω=0 and Ω=±1 sublevels. Upon ionization, the I−O bond shortensIodine oxides appear as reactive intermediates in atmospheric chemistry. Here, we investigate IO and HOI by mass‐selective threshold photoelectron spectroscopy (ms‐TPES), using synchrotron radiation. IO and HOI are generated by photolyzing iodine in the presence of ozone. For both molecules, accurate ionization energies are determined, 9.71±0.02 eV for IO and 9.79±0.02 eV for HOI. The strong spin‐spin interaction in the 3Σ− ground state of IO+ leads to an energy splitting into the Ω=0 and Ω=±1 sublevels. Upon ionization, the I−O bond shortens significantly in both molecules; thus, a vibrational progression, assigned to the I−O stretch, is apparent in both spectra.…
Autor(en): | Domenik Schleier, Engelbert Reusch, Lisa Lummel, Patrick Hemberger, Ingo Fischer |
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URN: | urn:nbn:de:bvb:20-opus-204751 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Chemie und Pharmazie / Institut für Physikalische und Theoretische Chemie |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | ChemPhysChem |
Erscheinungsjahr: | 2019 |
Band / Jahrgang: | 20 |
Heft / Ausgabe: | 19 |
Seitenangabe: | 2413-2416 |
Originalveröffentlichung / Quelle: | ChemPhysChem (2019) 20:19, 2413-2416. https://doi.org/10.1002/cphc.201900813 |
DOI: | https://doi.org/10.1002/cphc.201900813 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Freie Schlagwort(e): | ionization potential; photolysis; radicals; reactive intermediates; synchrotron radiatoren |
Datum der Freischaltung: | 30.06.2020 |
Lizenz (Deutsch): | CC BY-NC: Creative-Commons-Lizenz: Namensnennung, Nicht kommerziell 4.0 International |